Input: tca8418_keypad - add support for shared interrupt

Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/input/keyboard/tca8418_keypad.c b/drivers/input/keyboard/tca8418_keypad.c
index 1a2894dd03ca..ac4ff13f51cc 100644
--- a/drivers/input/keyboard/tca8418_keypad.c
+++ b/drivers/input/keyboard/tca8418_keypad.c
@@ -224,16 +224,18 @@ static irqreturn_t tca8418_irq_handler(int irq, void *dev_id)
         if (error) {
                 dev_err(&keypad_data->client->dev,
                         "unable to read REG_INT_STAT\n");
-                goto exit;
+                return IRQ_NONE;
         }
 
+        if (!reg)
+                return IRQ_NONE;
+
         if (reg & INT_STAT_OVR_FLOW_INT)
                 dev_warn(&keypad_data->client->dev, "overflow occurred\n");
 
         if (reg & INT_STAT_K_INT)
                 tca8418_read_keypad(keypad_data);
 
-exit:
         /* Clear all interrupts, even IRQs we didn't check (GPI, CAD, LCK) */
         reg = 0xff;
         error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg);
@@ -374,7 +376,9 @@ static int tca8418_keypad_probe(struct i2c_client *client,
                 client->irq = gpio_to_irq(client->irq);
 
         error = request_threaded_irq(client->irq, NULL, tca8418_irq_handler,
-                                     IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+                                     IRQF_TRIGGER_FALLING |
+                                     IRQF_SHARED |
+                                     IRQF_ONESHOT,
                                      client->name, keypad_data);
         if (error) {
                 dev_dbg(&client->dev,